Prevent the extra column of the log data tables to be ordered

This makes not much sense because its JSON data under the hood, and PostgreSQL errors when trying to do it.

src/DataTables/LogDataTable.php

@@ -208,6 +208,7 @@ class LogDataTable implements DataTableTypeInterface
 
         $dataTable->add('extra', LogEntryExtraColumn::class, [
             'label' => 'log.extra',
+            'orderable' => false, //Sorting the JSON column makes no sense: MySQL/Sqlite does it via the string representation, PostgreSQL errors out
         ]);
 
         $dataTable->add('timeTravel', IconLinkColumn::class, [